A community workshop repaired damaged appliances instead of immediately replacing them. At first, its volunteers recorded only how many objects they repaired. Although that number rose each month, it did not show whether the repaired objects remained useful. An appliance returned to the workshop the following week counted as another repair, even if the first repair had failed.
To obtain a more meaningful measure, the team began contacting owners three months after each visit. The records of these follow-up calls ① reveal how many appliances are still working. A repair that is completed quickly may appear successful, but its value depends partly on ② whether the object continues to serve its owner. By comparing repeated faults, volunteers can identify components ③ that need a different treatment. The additional information helps them avoid ④ to repeat an ineffective procedure. It also reminds them that the number of tasks completed is not necessarily the same as the number of problems ⑤ solved.
* appliance: 가전제품 / component: 부품